//
//  NSNull+Extension.h
//  测试 NSNull
//
//  Created by jinglian on 16/6/17.
//  Copyright © 2016年 kinglian. All rights reserved.
//

#import <Foundation/Foundation.h>


#define XYNullObjects @[@"",@0,@{},@[]]

@interface NSNull (Extension)
 

@end
